Allied Telesis AT-S39 - Manual (Page 114)

Chapter 12: Rapid Spanning Tree Protocol Commands
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migrationcheck Instructs the switch to send out RSTP BPDU packets
for several seconds from the selected port. The
purpose is to determine if there are any RSTP or STP
bridges connected to the port. If the port receives
STP BPDU packets in response, the port changes to
STP compatible mode. If the port receives RSTP
BPDU packets, it operates in RSTP.
Description
This command sets a port’s RSTP settings.
Examples
The following command sets Port 4’s port cost to 1 000 000 and it’s port
priority to 224:
set rstp port=4 portcost=1000000 portpriority=14
The following command changes Ports 7 to 10 so they are not
considered as edge ports:
set rstp port=7-10 edgeport=no
The following command returns Port 11 to the default RSTP settings:
set rstp port=1 default